"Rock faces blur in your peripheral vision, the opaque water sprays into myriads of white crystals with every turn, and you grip the hand rail for comfort and reassurance and then let out a whoop of excitement as the driver spins the boat around in its own boat length — wow, you've just experienced the World famous Shotover Jet full 360 degree spin. Hold on tight and enjoy the thrill as you spin and without losing momentum keep speeding along the river.
The best thing of all… this is all actually good for you." - From the Shotover website
I would agree that it is good for you!
http://www.shotoverjet.co.nz/
